ANALYZE_STATUS

The ANALYZE_STATUS table provides information about the running tasks that collect statistics and a limited number of history tasks.

Starting from TiDB v6.1.0, the ANALYZE_STATUS table supports showing cluster-level tasks. Even after a TiDB restart, you can still view task records before the restart using this table. Before TiDB v6.1.0, the ANALYZE_STATUS table can only show instance-level tasks, and task records are cleared after a TiDB restart.

Starting from TiDB v6.1.0, you can view the history tasks within the last 7 days through the system table mysql.analyze_jobs.

USE information_schema;
DESC analyze_status;

+----------------+---------------------+------+------+---------+-------+
| Field          | Type                | Null | Key  | Default | Extra |
+----------------+---------------------+------+------+---------+-------+
| TABLE_SCHEMA   | varchar(64)         | YES  |      | NULL    |       |
| TABLE_NAME     | varchar(64)         | YES  |      | NULL    |       |
| PARTITION_NAME | varchar(64)         | YES  |      | NULL    |       |
| JOB_INFO       | longtext            | YES  |      | NULL    |       |
| PROCESSED_ROWS | bigint(64) unsigned | YES  |      | NULL    |       |
| START_TIME     | datetime            | YES  |      | NULL    |       |
| END_TIME       | datetime            | YES  |      | NULL    |       |
| STATE          | varchar(64)         | YES  |      | NULL    |       |
| FAIL_REASON    | longtext            | YES  |      | NULL    |       |
| INSTANCE       | varchar(512)        | YES  |      | NULL    |       |
| PROCESS_ID     | bigint(64) unsigned | YES  |      | NULL    |       |
+----------------+---------------------+------+------+---------+-------+
11 rows in set (0.00 sec)

SELECT * FROM information_schema.analyze_status;

+--------------+------------+----------------+--------------------------------------------------------------------+----------------+---------------------+---------------------+----------+-------------+----------------+------------+
| TABLE_SCHEMA | TABLE_NAME | PARTITION_NAME | JOB_INFO                                                           | PROCESSED_ROWS | START_TIME          | END_TIME            | STATE    | FAIL_REASON | INSTANCE       | PROCESS_ID |
+--------------+------------+----------------+--------------------------------------------------------------------+----------------+---------------------+---------------------+----------+-------------+----------------+------------+
| test         | t          | p1             | analyze table all columns with 256 buckets, 500 topn, 1 samplerate |              0 | 2022-05-27 11:30:12 | 2022-05-27 11:30:12 | finished | NULL        | 127.0.0.1:4000 |       NULL |
| test         | t          | p0             | analyze table all columns with 256 buckets, 500 topn, 1 samplerate |              0 | 2022-05-27 11:30:12 | 2022-05-27 11:30:12 | finished | NULL        | 127.0.0.1:4000 |       NULL |
| test         | t          | p1             | analyze index idx                                                  |              0 | 2022-05-27 11:29:46 | 2022-05-27 11:29:46 | finished | NULL        | 127.0.0.1:4000 |       NULL |
| test         | t          | p0             | analyze index idx                                                  |              0 | 2022-05-27 11:29:46 | 2022-05-27 11:29:46 | finished | NULL        | 127.0.0.1:4000 |       NULL |
| test         | t          | p1             | analyze columns                                                    |              0 | 2022-05-27 11:29:46 | 2022-05-27 11:29:46 | finished | NULL        | 127.0.0.1:4000 |       NULL |
| test         | t          | p0             | analyze columns                                                    |              0 | 2022-05-27 11:29:46 | 2022-05-27 11:29:46 | finished | NULL        | 127.0.0.1:4000 |       NULL |
+--------------+------------+----------------+--------------------------------------------------------------------+----------------+---------------------+---------------------+----------+-------------+----------------+------------+
6 rows in set (0.00 sec)

Fields in the ANALYZE_STATUS table are described as follows:

• TABLE_SCHEMA: The name of the database to which the table belongs.
• TABLE_NAME: The name of the table.
• PARTITION_NAME: The name of the partitioned table.
• JOB_INFO: The information of the ANALYZE task. If an index is analyzed, this information will include the index name. When tidb_analyze_version =2, this information will include configuration items such as sample rate.
• PROCESSED_ROWS: The number of rows that have been processed.
• START_TIME: The start time of the ANALYZE task.
• END_TIME: The end time of the ANALYZE task.
• STATE: The execution status of the ANALYZE task. Its value can be pending, running,finished or failed.
• FAIL_REASON: The reason why the task fails. If the execution is successful, the value is NULL.
• INSTANCE: The TiDB instance that executes the task.
• PROCESS_ID: The process ID that executes the task.